Periodic Table of Elements

Front

What did Mendeleev use to arrange the elements in his periodic table?

Back

Mendeleev arranged the elements by their atomic mass.

Front

Which two elements are in the same group and have similar chemical properties?

Back

Potassium (K) and Sodium (Na) have similar chemical properties.

Front

What is the group of elements that have 1 valence electron?

Back

Group 1 elements have 1 valence electron.

Front

What are the vertical columns in the periodic table called?

Back

The vertical columns in the periodic table are called groups.

Front

How is the Modern Periodic Table of Elements arranged?

Back

The Modern Periodic Table is arranged by atomic number.

Front

What is the significance of atomic number in the periodic table?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

What are the horizontal rows in the periodic table called?

Back

The horizontal rows in the periodic table are called periods.

Front

What trend is observed in atomic size as you move down a group in the periodic table?

Back

Atomic size increases as you move down a group due to the addition of electron shells.

Front

What is the general trend in electronegativity across a period?

Back

Electronegativity generally increases across a period from left to right.

Front

What are noble gases, and where are they located in the periodic table?

Back

Noble gases are located in Group 18 and are characterized by having a full valence shell.